'''
Project CHEN Rendering Engine : /b.py
Created: 2021-02-15, Last modified:  2021-02-15

This is the default descriptor.

Copyright (C) 2021 Hineven (hineven@pku.edu.cn)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
'''
import matplotlib.pyplot as plt
fin = open("io", "r")
lns = fin.readlines()
xx = [[float(y) for y in x.split()] for x in lns]
x, y = zip(*xx)
plt.scatter(x, y, s=0.5)
plt.show()